prusage1
void prusage1(FILE *, const char *, int, struct rusage *, struct rusage *,
prusage1(fp, cp, 1, r0, r1, e, b);
void prusage1(FILE *, const char *fmt, int, struct rusage *, struct rusage *,
prusage1(stderr, fmt, prec, &null_ru, &ru, &after, &before);